Rule of Wolves by Leigh Bardugo
Book Description
In the sequel to King of Scars, the Demon King, the Stormwitch, the Queen of Mourning and the King, General and Spy all have intertwining storylines. As Fjerdaβs massive army prepares to invade, Nikolai Lantsov will summon every bit of ingenuity and charm - and even the monster within - to win. Zoya Nazyalensky has lost too much to war. She saw her mentor die and her worst enemy resurrected, and she refuses to bury another friend. Nina Zenik who is deep undercover risks discovery and death as she wages war on Fjerda from inside the capital.